2020年专升本英语语法大全.ppt
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- 2020 年专升 英语语法 大全
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1、2020年专升本英语语法大全If you put your hear into it,you will find it easy.第一讲第一讲.时时 态态英语主要靠动词本身形式的变化来表示动作的时间,副词的作用不大,语助词几乎没有。英语的句子,除少数特殊情况外,只要都离不开时态,都以一定的时态出现。换言之,只要是句子,就有时态问题。理由很简单:一个句子必须有主语和谓语动词(主要动词),而后者总是用于某一时态。学英语,时态是逃避不了的,但它并不是一个消极的因素。恰好相反,它有很强的表达力,能使句子的意思明确,能显示细微的差别,有时还能使句子生动有趣。一般英语有12种时态,即现在,过去,将来三大类
2、,每一类中又分为一般,进行,完成,完成进行4种。第一讲第一讲.时时 态态(一)现在完成时(1)构成 have/has+过去分词现在完成时的否定式/疑问式和简单回答形式:否定式I have not(havent)studied.You have not(havent)studied.He has not(hasnt)studied.We have not(havent)studiedThey have not(havent)studied.疑问式Have I studied?Have you studied?Has he studied?Have we studied?Have they stu
3、died?否定疑问式Have I not studied?(Havent I studied?)Have you not studied?(Havent you studied?)Has he not studied?(Hasnt he studied?)Have we not studied?(Havent we studied?)Have they not studied?(Havent they studied?)简单回答Yes,you have.No,you havent.Yes,I have.No,I havent.Yes,he has.No,he hasnt.Yes,we have
4、.No,we havent.Yes,they have.No,they havent.(2)用法1.在未指明具体时间的情况下,现在完成时动词通常可以表示在说话之前已经完成,而后果或影响至尽仍存在的动作.现在完成时把过去的动作和现在的结果联系起来.过去时只限于表示过去的动作本身,与现在的结果无关.例如:1)He has gone to shanghai.(He went to shanghai and he is not here now.)他已经去上海了.2)I have opened the window.(I opened the window and the window is open
5、 now.)我已把窗户打开.3)I have bought an umbrella.(I bought an umbrella and I have it now.)我买了一把伞.4)The concert has started.(The concert started and is now going on.)音乐会已经开始.5)I have had breakfast.(I had breakfast and I am not hungry now.)我已吃过早饭.注:have gone to和have been to在意义上有区别.例如:1)He has gone to Hangzho
6、u.他到杭州去了.(他已前往杭州,或在途中,或已到达.说话人认为他现在在该地.)2)He has been to Hangzhou.他曾到过杭州.(说话人认为他过去到过杭州,现在已经不在该地.)2.现在完成时动词可以表示开始于过去持续到现在(也许还会继续进行下去)的动作或状态.例如:1)I have studied English since 1975.我从一九七五年起就学习英语.2)They have been in Beijing since 1949.他们从一九四九年起就(住)在北京.3)He has lived here for two years.他住在这儿已经两年了.4)He ha
7、s been ill for ten days.他病了十天了.注:come,go,leave,arrive,join,die,bury,和marry等动词所表示的动作是一时的,不能延续的,故不能与for,since 等开头的表示一段时间的状语连用.如不能说:*He has come to Beijing for seven years.*He has left Beijing for two years.*He has joined the Army for three years.*His father has died for five months.可以说:He has been in
8、Beijing for seven years.He has been away from Beijing for two years.He has been in the army for three years.His father has been dead for five months.或:It is seven years since he came to Beijing.It is two years since he left Beijing.It is three years since he joined the Army.It is five months since h
9、is father died.现在完成时与一般过去时在意义上的区别举例如下:现 在 完 成 时 一 般 过 去 时1)I have seen him.我已见过他了.2)He has had lunch.他吃过午饭了.3)I have written to him.我已给他写过信了.4)I have been ill for a week.我已病了一周了.(现在还在生病.)5)I have never met him since last month.自从上月到现在我从未见过他.(现在还没见面.)1)I saw him yesterday.昨天看到过他.2)He had lunch at 12:
10、00.他十二点吃过午饭.3)I wrote to him last night.我昨晚给他写过信.4)I was ill for a week.我病了一周.(过去病了,现在好了.)5)I didnt see him for ages.我那时有好久没见到他.6)I never met him last month.上个月我一直没见到他.(仅指上个月.)注:现在完成时不能和明确指出时间的状语(如:yesterday,last year,in 1976,two days ago,just now,when I came in 等)连用,但可以和不明确指出时间的状语 (如:already,just,y
11、et,sometimes,always,often,before,lately,recently,once,twice,ever,never,so far,up to now,up till now,from then on,these days/months/years等)连用;也可以和表示包括现在在内的时间状语(如:this morning,today,this week,this year等)连用.例如:1)she has already come.她已经来了.2)I havent read it yet.我还没读过这个.3)I have met him before.我从前曾见过他.4
12、)Ma Hong has always been a good student.马红一直是个好学生.5)I have often seen him in the street.我经常在街上见到他.6)They have never been to Yanan.他们从未去过延安.7)Have you ever been to the Daqing Oilfield?你曾去过大庆油田吗?8)I havent seen him lately.我近来没看到他.9)I have seen him this morning.我上午看见他了。(说话时在上午)试比较:I saw him this mornin
13、g.今天上午遇见了他.(说话时是下午)10)It has been hot this summer.今年夏天一直很热.(说话时仍是夏天)(二)现在完成进行时现在完成进行时(1)构成 have/has been+现在分词(2)用法 1.现在完成进行时动词表示从过去开始一直 持续到现在的动作,这个动作 可能刚刚结束,也可能还要继续下去,常与 for two hours,since 1986,all this morning,these few days等表示一段时间的状语连用.例如:1)I have been reading all the morning.我一上午都在读书.(试与 I have
14、read three books this morning 比较.)2)He has been staying here for two hours.他在这儿待了两个小时了.(试与He was here for two hours 比较.)3)She has been living there since 1970.她从一九七O年以来就住在这里.(试与She has lived there since 1970 比较)4)I have been writing letters.我一直在写信.(试与I have written two letters 比较.)5)Where have you b
15、een?We have been looking for you everywhere.你去哪儿了?我们一直在找你.(试与 I was looking for you everywhere 比较.)6)I have just been watching TV.我一直都在看电视.2.现在完成进行时动词表示一直到说话时为止的一段时间内一再重复的动作.例如:1)I have been telephoning to you several times in two days.两天内我给你打过几次电话.2)They have been drinking black tea all the afterno
16、on.他们一下午都在喝红茶.3.现在完成进行时动词表示一直到说话时为止的一段时间内,大部分时间都在持续进行的动作(不一定延续到说话的时候),往往暗示这个动作对现状的影响.例如:1)What have you been doing this morning?(You look tried.)你今天早晨干什么了?(看来你累了.)2)You have been reading newspapers.(Newspapers are lying about in your room.)你一直在读报吧.(你的房间里到处摊着报纸.)3)You have been teaching.(Your pocket
17、is covered with chalk dust.)你刚才在教课吧.(你口袋上有粉笔灰.)注:现在完成进行时和现在完成时都可以表示“从过去开始一直持续到现在”这一概念,有时两者可以互相代用,但前者多用于口语.在含义上如着重表示动作的结果时,多用 现在完成时;如着重表示动作一直在进行,即动作的延续性时,则多用现在完成进行时.一般不能用于进行时的动词也不能用于现在完成进行时.试比较:1)I have written six letters since breakfast.从吃完早饭到现在我已经写了六封信.I have been writing letters.我一直在写信.2)I have w
18、aited for him for many times.我等他等了好几次了.I have been waiting for him for an hour.我等他等了一个小时.3)He has drunk five cups of tea.他喝了五杯茶.He has been drinking tea.他一直在喝茶.4)I have read this book.我读过这本书了.I have been reading this book.我一直在读这本书.5)That follow has drunk my wine.那家伙把我的酒喝光了.That follow has been drink
19、ing my wine.那家伙一直在喝我的酒.(三)过去完成时过去完成时 (1)构成 had+过去分词 (2)用法 1.过去完成时动词可以表示过去某一时刻或某一动作之前完成的动作或呈现的状态.在强调过去某一动作发生在另一动作之前时(有时两者相距很近),往往用这种时态.例如:1)By yesterday evening he had written that letter.到昨天晚上,他已写完那封信.2)By the end of last year we had built many new houses.到去年年底,我们已建了很多新房子.3)I thought I had met him b
20、efore.我认为我从前见过他.4)He said that he had seen you.他说他以前见过你.5)When I came in he had finished his homework.当我进来时,他已做完了作业.6)He said he had never been to Yanan.他说他从未去过延安.2.过去完成时动词可以表示过去某一时刻之前发生的动作或呈现的状态,这一动作一直持 续到过去这一时刻或将继续下去.例如:1)By the middle of last month I had lived in Beijing for five years.到上月中旬,我已在北
21、京住了五年了.2)By six oclock they had worked for eight hours.到六点为止,他们已经工作八小 时了.3)When I came to Shanghai,he had been there for a long time.我到上海时,他在那里很长时间了.3.过去完成时动词常用于间接引语和虚拟语气.(四)过去完成进行时过去完成进行时 (1)构成 had been+现在分词 (2)用法 过去完成进行时动词主要表示一直持续到过去某一时刻的动作.该动作可能刚结束,也可能还在进行.例如:1)I had been waiting in the parlor fo
22、r some thirty minutes before he came down to see me.他下楼见我之前,我在会客室里已经等了他三十分钟.2)By the end of 2005 he had been learning English for five years.But he was compelled to give up English and learn Russian instead.一直到2005年底,他都在学英语,学了五年.后来他不得不放弃英语而学俄语.3)Yesterday evening I had been watching television when
23、Li Hua came to ask me to solve a difficult maths problem.昨天晚上我在看电视的时候,李华来找我,让我帮他解决一个数学上的难题.4)I Was tired out;I had been reading for hours at a stretch.我连续读了几个小时的书,累极了.(五)过去将来时过去将来时 过去将来时动词可以表示对过去某一时间来说将要发生的动作或呈现的状态.过 去将来时有以下几种形式:(1)should/would+动词原形 例如:He said he would go to Shanghai for the holiday
24、.他说,他要到上海度假.(2)was/were going+动词不定式 1.过去将来时动词可以表示过去曾经打算或准备要做的动作.例如:They were going to have a meeting.他们曾经打算开个会.2.过去将来时动词可以表示过去的将要发生的或很有可能发生的动作.例如:I thought it was going to rain.那时我以为要下雨了.(3)was/were+动词不定式 was/were about+动词不定式 这两种结构也可以表示某种过去将来的意义.例如:1)The foreign diplomats were to see the President.T
25、he White House was astir,making preparation.外国使节将要会见总统.整个白宫都忙着做准备.(过去将来)2)We were to finish the work in three days.我们打算三天内完成任务.(过去的打算)3)I was about to go out when a friend dropped in.我刚要出去,来了一个朋友.4)He said the train was about to leave.火车马上就要来了.(六)将来进行时将来进行时 (1)构成 shall/will be+现在分词 (2)用法 1.将来进行时动词表示
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